At an online briefing, the European Medicines Agency’s Marco Cavaleri explained that the BA.4 and BA.5 mutations are expected to become dominant across the continent, “likely replacing all other variants by the end of July”.
He said that although there was no evidence the variants make people sicker than earlier strains of the virus, “the increase in transmission among older age groups is starting to translate into severe disease”.
It is also thought that BA.4 and BA.5 can infect people even if they’ve recently had other types of Omicron.
Doctors are recommending getting vaccinated against Covid if you haven’t already for the best protection against BA.4 and BA.5, among other variants.